Platinum nanocrystals supported on CoAl mixed metal oxide nanosheets derived from layered double hydroxides as catalysts for selective hydrogenation of cinnamaldehyde

• Sheetlike LDH and derived MMO were prepared as supports.
• The supported Pt catalyst was employed in the cinnamaldehyde hydrogenation reaction.
• Pt/CoAl-MMO achieves an increase in both conversion and selectivity.
• The effects of Co/Al ratio and calcination temperature were researched.

Pt nanoparticles supported on sheetlike mixed metal oxides (MMO) derived from layered double hydroxides are found to be highly efficient catalysts for the selective hydrogenation of cinnamaldehyde. A series of characterizations are employed to investigate the structure and composition of the support and catalyst. Divalent species have a significant influence on the activity and selectivity. CoAl MMO-supported catalysts achieve an increase in both conversion and selectivity to cinnamyl alcohol through the formation of PtCo alloy on the surfaces of catalysts during preparation. A possible reaction path is proposed. The effects of Co/Al ratio and calcination temperature on catalytic performance are researched in this work.

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